/*
 * Copyright (c) 2006, KNOPFLERFISH project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials
 *   provided with the distribution.
 *
 * - Neither the name of the KNOPFLERFISH project nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.knopflerfish.bundle.component;
import java.util.Dictionary;
import org.osgi.framework.Bundle;
import org.osgi.framework.ServiceRegistration;

import org.osgi.service.component.ComponentConstants;
import org.osgi.service.component.ComponentFactory;
import org.osgi.service.component.ComponentInstance;
import org.osgi.service.component.ComponentException;

class FactoryComponent extends Component 
  implements ComponentFactory {

  public FactoryComponent(Config config, 
			  Dictionary overriddenProps) {
    super(config, overriddenProps);
    // where should this be done?
    config.setProperty(ComponentConstants.COMPONENT_FACTORY, config.getFactory());
  }

  public void registerService() {

    serviceRegistration = 
      bundleContext.registerService(ComponentFactory.class.getName(), 
				    this, config.getProperties());
  }

  public void satisfied() {
    registerService();
  }
  
  public void unsatisfied() {
    unregisterService();
  }

  public Object getService(Bundle bundle, ServiceRegistration reg) {
    super.getService(bundle, reg);
    
    return this;
  }

  public void ungetService(Bundle bundle, ServiceRegistration reg, 
			   Object instance) {
    super.ungetService(bundle, reg, instance);
  }

  public ComponentInstance newInstance(Dictionary overriddenProps) {
    Config copy = config.copy();
    copy.setFactory(null);
    
    Component component = copy.createComponent(overriddenProps);
    component.enable();
    
    if (copy.isSatisfied()) {
      component.getService(usingBundle, serviceRegistration);
      return component.getComponentInstance(); 
    } else {
      throw new ComponentException("Declarative Services was not able " + 
				   " to satisfy component instance");

    }
  }
}

